## Averages Exercise

1. For the following scores, find:

(a) The median
(b) The mode
(c) The mean

(i) 9, 6, 5, 9, 3, 2 ,2, 1, 9

(ii) 201, 199, 200, 198, 201, 204, 196, 201

(iii) 20, 24, 24, 24, 40

(iv) 50.4, 30.9, 20.3, 20.1, 10.6, 5.3

 2 A weekend golfer plays seven rounds of golf in a week. His scores are: 90, 105, 92, 99, 81, 82, 81 (a) Calculate the mean, median and mode of these seven scores. (b) Which of these averages would not be very representative of his week's golf?

3. A woman has a part-time job. Her weekly pay for 2 months' work was:

\$212.50, \$311.80, \$410.70, \$313.10, \$204.50, \$212.00, \$409.20, \$379.60

(a) What was her mean weekly pay?

(b) What was her median pay?

4. The table below shows the number of international visitors who visited a country over the past 5 years.

Find the mean number of visitors.

 Year Number of visitors 1995 1 343 003 1996 1 441 838 1997 1 551 341 1998 1 464 766 1999 1 517 324

5. The results from a class of students at a high school in mathematics and English are listed below.

a. Find the mean, median and mode of each set of results.

 Mathematics 56 45 89 34 94 21 45 65 69 34 12 23 59 65 30 56 45 58 76 89 English 46 47 83 84 92 52 76 85 47 47 22 58 53 73 80 54 35 32 66 99